CN107557862A - Zirconium oxide single crystal fiber and preparation method and application - Google Patents
Zirconium oxide single crystal fiber and preparation method and application Download PDFInfo
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Abstract
The present invention relates to zirconium oxide single crystal fiber and preparation method and application.The crystal molecule formula is ZrO2, ZrO2Single crystal fiber is the fibrous ZrO for possessing extreme aspect ratio2Monocrystalline, have ZrO concurrently2Monocrystalline ZrO2The advantages of polycrystalline fibre.Diameter range：0.5 1mm, length>15cm.The present invention is using laser heated pedestal method (LHPG) growth ZrO2Single crystal fiber.Its fusing point is up to 2715 DEG C, and compared with prior art, zirconium oxide single crystal fiber of the present invention has the excellent physical and chemical performances such as high heat conductance, high rigidity, high intensity, high tenacity, high wearability and chemical resistance, can be used as preparing new pyrostat.
Description
Technical field
The present invention relates to a kind of new single crystal fiber and preparation method and application, more particularly to zirconium oxide single crystal fiber and
Its preparation method and application, belong to crystal and device arts.
Background technology
Pyrostat is mainly used in numerous necks such as Aero-Space, weapons manufacture, nuclear industry, metallurgy, chemical industry, heat treatment
Domain, the high temperature of thousands of degree can be measured.At present, domestic and international contact high temperature test generally uses high temperature thermoelectric even summation W-Re thermoelectricity
It is even, substantially meet the demand in middle low temperature field.However as deepening continuously, it is necessary to be surveyed to chamber temperature for investigative technique
Amount, particularly some special combustion fields, such as rocket and guided missile jet-flow temperature, scramjet engine chamber temperature,
Detonation pressure and detonation temperature etc..Traditional temp measuring method can not meet requirement, it is necessary to using high temperature single crystal fiber.
Currently used high temperature single crystal fiber mainly has Tm:YAG、Al2O3.Wherein Tm:YAG is the optical fiber of fluorescence lifetime type
Sensor, can carry out 1200 DEG C or so of temperature survey, but fluorescence efficiency at high temperature it is very low and can not thermometric.Sapphire
Crystal optical fibre is the fibre optical sensor of black matrix lumen type, is not limited by fluorescence efficiency, can carry out high temperature measurement, but by its fusing point
The limitation of (2050 DEG C), higher temperature survey can not be carried out.
Chinese patent document CN102212874A (application number 201110139624.8) discloses a kind of sapphire taper light
Fine preparation method.It uses laser heated pedestal method grower, is first circular sapphire crystal source rod top in cross section
End fusing forms stable melting zone, then sapphire fiber seed crystal is clicked and entered into sapphire crystal source rod top melting zone and forms sapphire light
Fibre growth melting zone；Then sapphire fiber seed crystal is lifted upwards, while sapphire crystal source rod is fed upwards, until stable
Growth forms the butt end of sapphire conical optical fibers.Under conditions of keeping sapphire crystal source rod feed rate Vs constant, change
The pull rate of sapphire fiber seed crystal, until the taper end of sapphire conical optical fibers is formed, thus in the butt end of sapphire fiber
Sapphire fiber tapered zone is formed between taper end.Terminate sapphire cone needed for reaching when the sapphire fiber grown after length
Shape YAG Fiber Growth, sapphire conical optical fibers both ends are cut, polish to obtain sapphire conical optical fibers.But sapphire crystal
Optical fiber is limited for (2050 DEG C) due to its fusing point, can not carry out more than 2000 DEG C of high temperature measurement.
Superhigh temperature transient test technology is in nuclear reactor, aero-engine, hypersonic vehicle, spaceship nose
The fields such as cone have great application value, and these testing fields are usually required in very high temperature (2300-2500 DEG C), high oxidation
Worked in the adverse circumstances such as property, highly corrosive, strong electromagnetic, intense radiation, and traditional noble metal contacts formula thermometric and infrared
Contactless temperature-measuring can not meet the requirement of superhigh temperature transient state thermometric, this just need temperature-measurement material and technology have it is higher
The features such as fusing point, inoxidizability, good light-transfer characteristic, heat endurance, chemical stability and mechanical strength.Exploitation has height
The superhigh temperature oxide of thermal conductivity, high rigidity, high intensity, high tenacity, high wearability and resistance to oxidation and chemical resistance
Single crystal fiber, turn into urgent problem to be solved.
The content of the invention
The problem of existing for prior art, the present invention provide a kind of zirconium oxide single crystal fiber and preparation method thereof with answering
With the single crystal fiber can be used as high temp sensitive material.
Technical scheme is as follows：
A kind of zirconium oxide single crystal fiber, the chemical composition of the optical fiber is zirconium oxide monocrystalline.
, according to the invention it is preferred to, the cross section of described optical fiber is circular or square.
, according to the invention it is preferred to, a diameter of 0.4-0.9mm, further preferred 0.45-0.7mm of described optical fiber；
Preferably, described fiber lengths >=15cm.
, according to the invention it is preferred to, the aspect ratio (length diameter ratio) >=150 of described zirconium oxide single crystal fiber:1.
, according to the invention it is preferred to, described zirconium oxide monocrystalline is cubic system, 2715 DEG C of fusing point, density 5.89g/
cm3, thermal coefficient of expansion 9.6 × 10-6/ K, thermal conductivity (2.5-2.9) w/ (mK), refractive index (2.15-2.23), dispersion 0.06,
Mohs' hardness (7.8-8.2).
According to the present invention, the preparation method of above-mentioned zirconium oxide single crystal fiber, including：
Zirconium oxide seed crystal preparation process；
Zirconia material lf step；
Zirconium oxide seed crystal receives neck, shouldering, isodiametric growth and Ti Tuo steps in zirconium oxide melting charge.
According to the preparation method of optical fiber of the present invention, it is preferred that crystal carry it is de- after also include high-temperature annealing step.
According to the preparation method of optical fiber of the present invention, it is preferred that by zirconia polycrystalline charge bar in zirconium oxide seed crystal preparation process
Square rod or pole are cut into as seed crystal or raw material；It is further preferred that described square rod or the length of pole are 10-200mm,
Further preferred 20-150mm；The a diameter of 1-5mm of polycrystal material；
Preferably, processing is dried after the completion of cutting；It is further preferred that drying temperature is 60-80 DEG C, drying time
For 4-6 hours.
According to the preparation method of optical fiber of the present invention, it is preferred that in zirconia material lf step, by fuel rod center
It is placed in progress raw materials melt at laser center；
Preferably, the power of laser is 250-400W.
According to the preparation method of optical fiber of the present invention, it is preferred that receive neck power 180-240W.Shouldering, isodiametric growth power
120-180W.It can be selected according to polycrystal material diameter and pull rate.
Preferably, shouldering and isodiametric growth are carried out when seed crystal diameter is received carefully to 0.3-0.5mm during receipts neck；
Preferably, during isodiametric growth, pull rate is 0.4-1.5mm/ minutes；
Preferably, zirconia material rod is fed simultaneously during isodiametric growth, and delivery rate is 0.1-0.5mm/ points
Clock.
According to the preparation method of optical fiber of the present invention, it is preferred that during crystal growth to required size, rise laser power is extremely
180-240W, crystal is carried de-.
According to the preparation method of optical fiber of the present invention, it is preferred that high during crystal is carried out in atmosphere in high-temperature annealing step
Temperature annealing, annealing temperature are 1000-1500 DEG C, annealing time 20-40h.Temperature fall after the completion of annealing, to eliminate crystal
In thermal stress.
According to the preparation method of optical fiber of the present invention, a kind of preferable scheme, step step is as follows：
(1) selection and processing of source rod and seed crystal
By ZrO2Polycrystalline charge bar be respectively cut growth 150mm and 20mm two kinds of square rods or pole as raw material and seed crystal,
It is fixed in refractory ceramics glue with reeded corundum bar, 4-6 hours is dried at 60-80 DEG C；
(2) crystal growth
A. furnace chamber and laser mirror are cleaned, the fuel rod prepared is fixed on feed arrangement, the seed that will be prepared
Crystalline substance is fixed on the pulling apparatus of top；Improving laser power melts charge bar, and regulation charge bar is centrally located at laser reflection focus
Place, continue increased wattage, be allowed to form stable hemispherical melting zone, constant temperature 5-10 minutes；
B. decline seed crystal to be allowed to contact with melting zone, regulation seed crystal position is allowed to be located at melting zone center, and adjustment heating power is extremely
When seed crystal diameter neither expands and do not reduced, pulling apparatus is started, and gradually rises power, carries out receipts neck；When seed crystal diameter is received
When carefully to 0.3-0.5mm, shouldering and isodiametric growth are carried out；Growth course middle and upper part pull rate：0.4-1.5mm/ minutes, bottom
Feed speed：0.1-0.5mm/ minutes；During crystal growth to required size, power is gradually risen, crystal is carried de-；
C. it is through-flow to take offence after closing laser with the rate reduction laser power of 5-50W/ minutes after crystal growth terminates
Atmosphere opens growth furnace after 5-15 minutes；
D. after growth terminates, crystal is subjected to high temperature annealing in atmosphere, to eliminate the thermal stress in crystal.
The ZrO of the present invention2Single crystal fiber fusing point is up to 2715 DEG C, cubic system, has higher intensity, hardness, wear-resisting
Property and corrosion resistance, are the ideal materials as superhigh temperature detector.
According to the present invention, application of the described zirconium oxide mono-crystlling fibre as high temp sensitive material.
The features of the present invention and have the beneficial effect that：
1st, the present invention obtains ZrO using laser heating pedestal technology (LHPG)2Single crystal fiber, fibre diameter is in 0.5-
Within the scope of 1mm, length reaches more than 15cm, possesses great aspect ratio, and crystal diameter fluctuating is smaller, and surface is relatively smooth, brilliant
Weight is higher, is a kind of brand-new function admirable high temp sensitive material.
2nd, relative to other materials, ZrO of the invention2Single crystal fiber has following superiority：Fusing point is up to 2715 DEG C, can
To carry out 2000 DEG C -2500 DEG C of high temperature measurement；With high heat conductance, high rigidity, high intensity, high tenacity, high wearability
And the physical and chemical performance that chemical resistance etc. is excellent, it can be worked in the adverse circumstances such as high temperature, aggressive atmosphere.
3rd, the preparation process of zirconium oxide mono-crystlling fibre of the present invention, ZrO can be reached with laser heated pedestal method2Fusing point
Temperature, solves the too high obstruction brought of its fusing point, by accurately controlling different charge bar diameters, laser work(of the different casting than under
Rate so that melting zone is more uniform, and YAG Fiber Growth process is more steady, and fibre diameter rises and falls smaller, it is easier to obtains high quality
ZrO2Single crystal fiber.
Brief description of the drawings
Fig. 1 is ZrO made from embodiment 12Single crystal fiber sample photo.
Fig. 2 is ZrO made from embodiment 12Monocrystalline XRD test charts, wherein：Abscissa is the θ of angle 2, unit degree, ordinate
For intensity, arbitrary unit.
Embodiment
With reference to embodiment, the present invention will be further described, but not limited to this.
Embodiment 1
ZrO2Single crystal fiber preparation method is as follows：
(1) selection and processing of source rod and seed crystal
By ZrO21 × 1 × 150mm and 1 × 1 × 20mm two kinds of square rods are respectively cut into as raw material and seed in polycrystal material
Crystalline substance, it is fixed in refractory ceramics glue with reeded Al2O3On bar, dried 4 hours at 65 DEG C.
(2) crystal growth
A cleans furnace chamber and laser mirror, the raw material prepared side is fixed on feed arrangement, the seed crystal that will be prepared
It is fixed on the pulling apparatus of top.Improve laser power melts charge bar to 100W, and regulation charge bar is centrally located at laser reflection
Focal point, continue increased wattage to 140W, be allowed to form stable hemispherical melting zone, constant temperature 10 minutes.
B declines seed crystal and is allowed to contact with melting zone, and regulation seed crystal position is allowed to be located at melting zone center, adjustment heating power to seed
When brilliant diameter neither expands and do not reduced, pulling apparatus is started, and gradually rises power to 200W, carries out receipts neck.When seed crystal is straight
When footpath is received carefully to 0.5mm, adjustment power to 160W carries out shouldering and isodiametric growth.Growth course middle and upper part pull rate：
0.4mm/ minutes, bottom feed speed：0.2mm/ minutes.During crystal growth to required size, power is gradually risen to 200W, will
Crystal carries de-.
After c crystal growths terminate, with the rate reduction laser power of 20W/ minutes, after closing laser, through-flow atmosphere of taking offence
Blow-on after 15 minutes.
D carries out high temperature annealing in atmosphere after growth terminates, to crystal, to eliminate the thermal stress in crystal.
Specific cycle of annealing is as follows：The ZrO obtained will be grown2Single crystal fiber is warming up to 1000 DEG C of simultaneously constant temperature 30 hours in sintering furnace,
Then it is slowly decreased to room temperature.
Embodiment 2
ZrO2Single crystal fiber preparation method is as follows：
(1) selection and processing of source rod and seed crystal
By ZrO21 × 1 × 150mm and 1 × 1 × 20mm two kinds of square rods are respectively cut into as raw material and seed in polycrystal material
Crystalline substance, it is fixed in refractory ceramics glue with reeded Al2O3On bar, dried 4 hours at 65 DEG C.
(2) crystal growth
A cleans furnace chamber and laser mirror, the raw material prepared side is fixed on feed arrangement, the seed crystal that will be prepared
It is fixed on the pulling apparatus of top.Improve laser power melts charge bar to 100W, and regulation charge bar is centrally located at laser reflection
Focal point, continue increased wattage to 140W, be allowed to form stable hemispherical melting zone, constant temperature 10 minutes.
B declines seed crystal and is allowed to contact with melting zone, and regulation seed crystal position is allowed to be located at melting zone center, adjustment heating power to seed
When brilliant diameter neither expands and do not reduced, pulling apparatus is started, and gradually rises power to 200W, carries out receipts neck.When seed crystal is straight
When footpath is received carefully to 0.5mm, adjustment power to 150W carries out shouldering and isodiametric growth.Growth course middle and upper part pull rate：
1.2mm/ minutes, bottom feed speed：0.5mm/ minutes.During crystal growth to required size, power is gradually risen to 200W, will
Crystal carries de-.
After c crystal growths terminate, with the rate reduction laser power of 10W/ minutes, after closing laser, through-flow atmosphere of taking offence
Blow-on after 15 minutes.
D carries out high temperature annealing in atmosphere after growth terminates, to crystal, to eliminate the thermal stress in crystal.
Specific cycle of annealing is as follows：The ZrO obtained will be grown2Single crystal fiber is warming up to 1200 DEG C of simultaneously constant temperature 24 hours in sintering furnace,
Then it is slowly decreased to room temperature.
Embodiment 3：
ZrO2Single crystal fiber preparation method is as follows：
(1) selection and processing of source rod and seed crystal
By ZrO21 × 1 × 150mm and 1 × 1 × 20mm two kinds of square rods are respectively cut into as raw material and seed in polycrystal material
Crystalline substance, it is fixed in refractory ceramics glue with reeded Al2O3On bar, dried 4 hours at 80 DEG C.
(2) crystal growth
A cleans furnace chamber and laser mirror, the raw material prepared side is fixed on feed arrangement, the seed crystal that will be prepared
It is fixed on the pulling apparatus of top.Improve laser power melts charge bar to 100W, and regulation charge bar is centrally located at laser reflection
Focal point, continue increased wattage to 140W, be allowed to form stable hemispherical melting zone, constant temperature 10 minutes.
B declines seed crystal and is allowed to contact with melting zone, and regulation seed crystal position is allowed to be located at melting zone center, adjustment heating power to seed
When brilliant diameter neither expands and do not reduced, pulling apparatus is started, and gradually rises power to 200W, carries out receipts neck.When seed crystal is straight
When footpath is received carefully to 0.3mm, adjustment power 130W carries out shouldering and isodiametric growth.Growth course middle and upper part pull rate：1.5mm/
Minute, bottom feed speed：0.3mm/ minutes.During crystal growth to required size, power is gradually risen to 200W, crystal is carried
It is de-.
After c crystal growths terminate, with the rate reduction laser power of 5W/ minutes, after closing laser, through-flow atmosphere 15 of taking offence
Blow-on after minute.
D carries out high temperature annealing in atmosphere after growth terminates, to crystal, to eliminate the thermal stress in crystal.
Specific cycle of annealing is as follows：The ZrO obtained will be grown2Single crystal fiber is warming up to 1300 DEG C of simultaneously constant temperature 24 hours in sintering furnace,
Then it is slowly decreased to room temperature.
Embodiment 4：
ZrO2Single crystal fiber preparation method is as follows：
(1) selection and processing of raw material
By ZrO22 × 2 × 150mm and 2 × 2 × 20mm two kinds of square rods are respectively cut into as raw material and seed in polycrystal material
Crystalline substance, it is fixed in refractory ceramics glue with reeded Al2O3On bar, dried 6 hours at 80 DEG C.
(2) crystal growth
A cleans furnace chamber and laser mirror, the raw material prepared side is fixed on feed arrangement, the seed crystal that will be prepared
It is fixed on the pulling apparatus of top.Improve laser power melts charge bar to 120W, and regulation charge bar is centrally located at laser reflection
Focal point, continue increased wattage to 180W, be allowed to form stable hemispherical melting zone, constant temperature 20 minutes.
B declines seed crystal and is allowed to contact with melting zone, and regulation seed crystal position is allowed to be located at melting zone center, adjustment heating power to seed
When brilliant diameter neither expands and do not reduced, pulling apparatus is started, and gradually rises power to 220W, carries out receipts neck.When seed crystal is straight
When footpath is received carefully to 0.3mm, adjustment power to 180W carries out shouldering and isodiametric growth.Growth course middle and upper part pull rate：
1.35mm/ minutes, bottom feed speed：0.15mm/ minutes.During crystal growth to required size, power is gradually risen to 220W,
Crystal is carried de-.
After c crystal growths terminate, with the rate reduction laser power of 5W/ minutes, after closing laser, through-flow atmosphere 15 of taking offence
Blow-on after minute.
D carries out high temperature annealing in atmosphere after growth terminates, to crystal, to eliminate the thermal stress in crystal.
Specific cycle of annealing is as follows：The ZrO obtained will be grown2Single crystal fiber is warming up to 1400 DEG C of simultaneously constant temperature 24 hours in sintering furnace,
Then it is slowly decreased to room temperature.
Comparative example 1
As described in Example 1, unlike：
Growth course middle and upper part pull rate in step (2) b：2mm/ minutes.Pull rate is too fast, can cause crystals
Stress is excessive, easily produces defect, influences crystal mass
Comparative example 2
As described in Example 1, unlike：
Growth course middle and upper part pull rate in step (2) b：0.2mm/ minutes.Pull rate is relatively too small, causes gained
Fiber crystal diameter is excessive.
Comparative example 3
As described in Example 1, unlike：
Growth course middle and lower part feed speed in step (2) b：0.04mm/ minutes.Lifting is than being more than 9 up and down:1, melting zone is steady
Qualitative decline, fibre diameter rise and fall greatly, influence crystal mass.
Test example 1
The physical index of product made from testing example 1-4 and comparative example 1-3, as shown in table 1.
Table 1
| Fusing point | Shape of cross section | Diameter | Length | |
| Embodiment 1 | 2750 | It is circular | 0.70mm | 19.5cm |
| Embodiment 2 | 2720 | It is circular | 0.65mm | 15.0cm |
| Embodiment 3 | 2705 | It is circular | 0.45mm | 18.0cm |
| Embodiment 4 | 2719 | It is circular | 0.66mm | 16.0cm |
| Comparative example 1 | 2730 | It is circular | 0.30mm | 5.0cm |
| Comparative example 2 | 2742 | It is circular | 1.05mm | 12cm |
| Comparative example 3 | 2721 | It is circular | 0.30mm | 3.5cm |
By table 1, zirconium oxide single crystal fiber uniform diameter made from 1-4 of the embodiment of the present invention, length 15cm with
On, aspect ratio >=230.
Improper, the obtained zirconium oxide single crystal fiber poor quality of comparative example 1-3 preparation parameters control, length are shorter.
Claims (10)
1. a kind of zirconium oxide single crystal fiber, it is characterised in that the chemical composition of the optical fiber is zirconium oxide monocrystalline.
2. zirconium oxide single crystal fiber according to claim 1, it is characterised in that a diameter of 0.4- of described optical fiber
0.9mm, it is preferred that described fiber lengths >=15cm.
3. zirconium oxide single crystal fiber according to claim 1, it is characterised in that described zirconium oxide monocrystalline is cubic crystal
System, 2715 DEG C of fusing point, density 5.89g/cm3, thermal coefficient of expansion 9.6 × 10-6/ K, thermal conductivity 2.5-2.9w/ (mK), refractive index
2.15-2.23 dispersion 0.06, Mohs' hardness 7.8-8.2.
4. the preparation method of the zirconium oxide single crystal fiber described in claim any one of 1-3, including：
Zirconium oxide seed crystal preparation process；
Zirconia material lf step；
Zirconium oxide seed crystal receives neck, shouldering, isodiametric growth and Ti Tuo steps in zirconium oxide melting charge.
5. the preparation method of zirconium oxide single crystal fiber according to claim 4, it is characterised in that crystal carry it is de- after also include
High-temperature annealing step.
6. the preparation method of zirconium oxide single crystal fiber according to claim 4, it is characterised in that zirconium oxide seed crystal prepares step
Zirconia polycrystalline charge bar is cut into square rod or pole as seed crystal or raw material in rapid；
Preferably, the length of described square rod or pole is 10-200mm, a diameter of 1-5mm of polycrystal material；
Preferably, processing is dried after the completion of cutting, drying temperature is 60-80 DEG C, and drying time is 4-6 hours.
7. the preparation method of zirconium oxide single crystal fiber according to claim 4, it is characterised in that zirconia material laser melts
Melt in step, fuel rod center is placed in progress raw materials melt at laser center；
Preferably, the power of laser is 250-400W.
8. the preparation method of zirconium oxide single crystal fiber according to claim 4, it is characterised in that receive neck power 180-
240W, shouldering, isodiametric growth power 120-180W；
Preferably, shouldering and isodiametric growth are carried out when seed crystal diameter is received carefully to 0.3-0.5mm during receipts neck.
9. the preparation method of zirconium oxide single crystal fiber according to claim 4, it is characterised in that during isodiametric growth,
Pull rate is 0.4-1.5mm/ minutes；
Preferably, zirconia material rod is fed simultaneously during isodiametric growth, and delivery rate is 0.1-0.5mm/ minutes.
10. the preparation method of zirconium oxide single crystal fiber according to claim 4, it is characterised in that in high-temperature annealing step,
Crystal is subjected to high temperature annealing in atmosphere, annealing temperature is 1000-1500 DEG C, annealing time 20-40h.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330540A (en) * | 2018-04-12 | 2018-07-27 | 山东大学 | Hafnium oxide single crystal fiber and the preparation method and application thereof |
| CN108977882A (en) * | 2018-08-31 | 2018-12-11 | 山东大学 | Sesquichloride single crystal fiber and the preparation method and application thereof |
| CN110777429A (en) * | 2019-10-15 | 2020-02-11 | 山东大学 | Preparation device and method of crystal optical fiber |
| CN112095144A (en) * | 2020-09-02 | 2020-12-18 | 上海理工大学 | Method for preparing CeF3 single crystal optical fiber by laser heating pedestal method |
| CN112281213A (en) * | 2020-10-26 | 2021-01-29 | 山东大学 | Rare earth doping (Lu)aScbYc)2O3(a + b + c = 1) single crystal optical fiber, and preparation method and application thereof |
| CN112965162A (en) * | 2021-03-04 | 2021-06-15 | 山东大学 | High-sensitivity single crystal optical fiber temperature measurement method based on single crystal optical fiber acoustic anisotropy and doping modulation |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108330540A (en) * | 2018-04-12 | 2018-07-27 | 山东大学 | Hafnium oxide single crystal fiber and the preparation method and application thereof |
| CN108977882A (en) * | 2018-08-31 | 2018-12-11 | 山东大学 | Sesquichloride single crystal fiber and the preparation method and application thereof |
| CN108977882B (en) * | 2018-08-31 | 2021-02-12 | 山东大学 | Sesquioxide single crystal optical fiber and preparation method and application thereof |
| CN110777429A (en) * | 2019-10-15 | 2020-02-11 | 山东大学 | Preparation device and method of crystal optical fiber |
| CN112095144A (en) * | 2020-09-02 | 2020-12-18 | 上海理工大学 | Method for preparing CeF3 single crystal optical fiber by laser heating pedestal method |
| CN112281213A (en) * | 2020-10-26 | 2021-01-29 | 山东大学 | Rare earth doping (Lu)aScbYc)2O3(a + b + c = 1) single crystal optical fiber, and preparation method and application thereof |
| CN112281213B (en) * | 2020-10-26 | 2022-04-26 | 山东大学 | Rare earth doping (Lu)aScbYc)2O3(a + b + c = 1) single crystal optical fiber, and preparation method and application thereof |
| CN112965162A (en) * | 2021-03-04 | 2021-06-15 | 山东大学 | High-sensitivity single crystal optical fiber temperature measurement method based on single crystal optical fiber acoustic anisotropy and doping modulation |
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